title: Vascular endothelial growth factor enhances in vitro proliferation and osteogenic differentiation of human dental pulp stem cells.
abstract: Mesenchymal stem cells (MSC), isolated from dental tissues, are largely studied for future application in regenerative dentistry. In this study, we used MSC obtained from human dental pulp (DPSC) of normal impacted third molars that, when cultured in lineage-specific inducing media, differentiate into osteoblasts and adipocytes (evaluated by Alizarin Red S and Red Oil O stainings, respectively), thus showing a multipotency. We confirmed that DPSC, grown under undifferentiating conditions, are negative for hematopoietic (CD45, CD31, CD34, CD144) and positive for mesenchymal (CD29, CD90, CD105, CD166, CD146, STRO-1) markers, that underwent down-regulation when cells were grown in osteogenic medium for 3 weeks. In this condition, they also exhibit an increase in the expression of osteogenic markers (RUNX-2, alkaline phosphatase) and extracellular calcium deposition, whereas the expression of receptors (VEGFR-1 and -2) for vascular endothelial growth factors (VEGF) and related VEGF binding proteins was similar to that found in undifferentiated DPSC. Exposure of DPSC growing under undifferentiating or osteogenic conditions to VEGF-A165 peptide (10-40 ng/ml) for 8 days dose- and time-dependently increased the number of proliferating cells without inducing differentiation towards endothelial lineage, as evaluated by the lack of expression of specific markers (CD31, CD34, CD144). Additionally, exposure of DPSC cultured in osteogenic medium to VEGF-A165 for a similar period enhanced cell differentiation towards osteoblasts as evaluated after 14 and 21 days by Alizarin Red S staining and alkaline phosphatase activity quantification. These findings may have clinical implications possibly facilitating tissue repair and remodeling.
authors.affiliation: Department of Biomedical Sciences, University of Chieti, Italy.
authors.forename: I
authors.initials: I
authors.lastname: D' Alimonte
authors.forename: E
authors.initials: E
authors.lastname: Nargi
authors.forename: F
authors.initials: F
authors.lastname: Mastrangelo
authors.forename: G
authors.initials: G
authors.lastname: Falco
authors.forename: P
authors.initials: P
authors.lastname: Lanuti
authors.forename: M
authors.initials: M
authors.lastname: Marchisio
authors.forename: S
authors.initials: S
authors.lastname: Miscia
authors.forename: I
authors.initials: I
authors.lastname: Robuffo
authors.forename: M
authors.initials: M
authors.lastname: Capogreco
authors.forename: S
authors.initials: S
authors.lastname: Buccella
authors.forename: S
authors.initials: S
authors.lastname: Caputi
authors.forename: F
authors.initials: F
authors.lastname: Caciagli
authors.forename: S
authors.initials: S
authors.lastname: Tetè
authors.forename: R
authors.initials: R
authors.lastname: Ciccarelli
mesh_terms: D000293:Adolescent; D000943:Antigens, Differentiation / Q000378:metabolism; D002454:Cell Differentiation / Q000187:drug effects*; D049109:Cell Proliferation / Q000187:drug effects*; D002478:Cells, Cultured; D003782:Dental Pulp / Q000166:cytology / Q000378:metabolism*; D005260:Female; D006801:Humans; D008297:Male; D059630:Mesenchymal Stem Cells / Q000166:cytology / Q000378:metabolism*; D010012:Osteogenesis / Q000187:drug effects*; D042461:Vascular Endothelial Growth Factor A / Q000494:pharmacology*
chemical_list: D000943:Antigens, Differentiation; C467484:VEGFA protein, human; D042461:Vascular Endothelial Growth Factor A